The answer would be C.
The salt and the water have both undergone physical changes.
Hope this helps!
N=14
H= 1(5)= 5
C=12(2)=24
O=16(2)=32
= 75
The partial pressure of gas C is 0.902 atm
calculation
partial pressure of gas c =[( percent by volume of gas C / total percent) x total pressure]
percent by volume of gas C= 22%
Total percent = 36% +42% + 22% = 100 %
Total pressure = 4.1 atm
partial pressure of gas C is therefore = 22/100 x 4.1 atm = 0.902 atm